WeatherBrains 101: Troughs come in a variety of types including positive, neutral, and negative. So what determines what kind of trough it is. And especially what does a negatively tilted trough mean? We explore the characteristics of a negatively tilted trough.

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The WeatherBrains crew includes your host, James Spann, plus other notable geeks like JP Spann and Brian Peters. They bring together a wealth of weather knowledge and experience for another fascinating netcast about weather.